Hi@dbryantgeo– you might try clearing the location where FME Hub/Store downloaded items appear, and reopening FME Workbench.The FMEServerEmailGenerator is a custom transformer and perhaps there is some sort of conflict.
macOS: ~/Library/Caches/Safe Software/FME/FME Store/
Windows: ~\AppData\Roaming\Safe Software\FME\FME Store\
If that does not work – try removing all instances of the FMEServerEmailGenerator from the workspace (after making a backup of it!) and then re-add it.When you have an embedded custom transformer in the workspace, FME will load that version of it – could be some odd corruption.
Hope that helps!The suggestions in the comments directly under your post might be helpful too.